effect-io-ai

Package: effect
Module: Array

Array.findFirstWithIndex

Returns a tuple of the first element that satisfies the specified predicate and its index, or None if no such element exists.

Example

import { Array } from "effect"

const result = Array.findFirstWithIndex([1, 2, 3, 4, 5], x => x > 3)
console.log(result) // Option.some([4, 3])

Signature

declare const findFirstWithIndex: { <A, B>(f: (a: NoInfer<A>, i: number) => Option.Option<B>): (self: Iterable<A>) => Option.Option<[B, number]>; <A, B extends A>(refinement: (a: NoInfer<A>, i: number) => a is B): (self: Iterable<A>) => Option.Option<[B, number]>; <A>(predicate: (a: NoInfer<A>, i: number) => boolean): (self: Iterable<A>) => Option.Option<[A, number]>; <A, B>(self: Iterable<A>, f: (a: A, i: number) => Option.Option<B>): Option.Option<[B, number]>; <A, B extends A>(self: Iterable<A>, refinement: (a: A, i: number) => a is B): Option.Option<[B, number]>; <A>(self: Iterable<A>, predicate: (a: A, i: number) => boolean): Option.Option<[A, number]>; }

Source

Since v3.17.0